133403541 has 16 divisors (see below), whose sum is σ = 187545600. Its totient is φ = 84114288.

The previous prime is 133403521. The next prime is 133403549. The reversal of 133403541 is 145304331.

It is a happy number.

It is not a de Polignac number, because 133403541 - 2¹⁸ = 133141397 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133403549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40540 + ... + 43706.

It is an arithmetic number, because the mean of its divisors is an integer number (11721600).

Almost surely, 2^133403541 is an apocalyptic number.

It is an amenable number.

133403541 is a deficient number, since it is larger than the sum of its proper divisors (54142059).

133403541 is a wasteful number, since it uses less digits than its factorization.

133403541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3928.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 133403541 is about 11550.0450648471. The cubic root of 133403541 is about 510.9626071905.

Adding to 133403541 its reverse (145304331), we get a palindrome (278707872).

The spelling of 133403541 in words is "one hundred thirty-three million, four hundred three thousand, five hundred forty-one".